p8.140_solution

p8.140_solution - FLOWLAB SOLUTION 8.140 Use the expansion...

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FLOWLAB SOLUTION 8.140 Use the expansion FlowLab template to model viscous flow in a pipe that contains a sudden expansion from radius R 1 to R 2 > R 1 . Conduct a parametric study to investigate the effects of the expansion ratio, R 2 / R 1 , on the overall pressure drop, p , in the pipe. Fix the entrance pipe geometry to a radius of R 1 = 0.1 m and length of l 1 = 1.0 m. Also, fix the exit pipe length at l 2 = 10.0 m. Set the density, viscosity, and inlet velocity to maintain a constant Reynolds number of Re = 20,000 for all simulations. Run simulations for expansion ratios of R 2 / R 1 = 2.0, 2.5, and 3.0. Examine the overall pressure drop in the pipe from inlet to outlet, as well as the outlet velocity. Using concepts studied in this chapter, explain the trends in the pressure drop and outlet velocity. Problem Setup For this fixed Reynolds number, the flow was set to turbulent and the Boundary Conditions and Materials settings were adjusted to give Re = 20,000 as shown. The fine grid mesh density was selected for all of the simulations.
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This note was uploaded on 03/27/2010 for the course ME 330 taught by Professor All during the Spring '08 term at University of Texas.

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p8.140_solution - FLOWLAB SOLUTION 8.140 Use the expansion...

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